Centrifugal separator



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UNITED STATES ATnNT @risica CHARLES A. BAOKSTROM, OF NEW YORK, N. Y., ASSIGNOR IO GEORGE WESTINGHOUSE, OF PITTSBURG, PENNSYLVANIA.

CENTRIFUGAL SEFARA'I'OR.V

SPECIFICATION forming part of Letters Patent No. 597,253, dated January 11, 1898.

Application filed September 26, 1896. Serial No. 607,010. (No model.)

To all whom it 72mg/ concern:

Be it known that I, CHARLES Ancns'rnon, a citizen of the United States, residing in the city of NeuT York, in the county and State of New York, have invented a ner and useful Improvement in Centrifugal Separatore, (Case No. 71.4,) of which the following is a specication.

My invention relates to centrifugal separators, and has particular reference to the means employed for driving the same.

The object of my invention is to provide a simple, inexpensive, and efficient means for driving machines of the class referred to which may be mounted directly upon the separator proper, so as to form a part thereof. Prior to my invention centrifugal separators employed for separating liquids of different specific gravity were usually driven either by hand or by means of motors separate from the machine and connected thereto by suitable gearing.

I propose by myinvention to dispense with all intermediate gearing between the motor and the separator-bowl and therefore to drive the motor and the bowl at the same speed. I propose also to so construct and mount the motor employed that it will have practically no bearin gs except those of the separatorbowl.

In the accompanying drawings, Figure 1 is a view, partially in vertical section and partia-ily in side elevatiomof a centrifugal separator equipped with my invention. Fig. 2 is a horizontal section on the line fr: a' of Fig. l, the outer casing or frame being omitted. Fig. 3 is a horizontal section through the motor on line y 3,1 of Fig. l. Fig. 4 is a side elevation of the motor-drums.

Referring nou7 to the detailed-construction illustrated in the drawings, l is a combined stand and casing for the rotative parts of the device, provided with the usual chambers, receptacles, and pipes for receiving and conducting away the liquids which are separated by said rotative parts.

2 is ,the separator-bowl, from the lower end of which depends a sleeve 3. A stationary stud or post 4 is screwed into the bottom portion of the combined stand and casing l and extends through the sleeve 3 into the boWl 2.

Suitable ball-bearings (not shown) are interposed betWeen the stud 4 and the bowl 2, as is usual in this class of machines.

The parts thus far described are of usual construction.

The motor which I employ for driving the vseparator-bowl, and Which, on account of its peculiar structure and mode of operation, I designate as a heliodont or heliodontal7 engine, will noiv be described. The casing 5 of the motor surrounds the lower end of the sleeve 3 and is screwed into rigid engagement with the stud 4. This casing-contains a pair of intermeshing toothed drums G and 7, which constitute the moving parts of my engine or motor. The drum 6 comprises a sleeve S and a plurality of plates or disks 9, clamped together and rigid with said sleeve, the latter being screwed upon the sleeve d, as indicated in the drawings. Each plate is shown as provided With three gear-teeth, though a greater number of teeth may be employed, if desired. The teeth on the plates Si, beginning with the middle plate, are so placed that each successive tooth shall be in advance oi the preceding one, thus forming three diagonalor heliF cal lines of such teeth and an equal number of grooves pitched in opposite directions and extending from the middle to each end of the drum.

The drum 7 comprises a plurality,7 of plates 9*"L of the same form and dimensions and ai ranged in the same manner as the plates 9. The sleeved, upon which the plates 9 are mounted, surrounds and is supported by a cylinder 10, through which extends a guid ing-pin ll. The interior ci the casing 5 is of such size and form that thedrums 6 and 7 will accurately fit the same. The casing is provided at one side With an inlet-port l2, With which communicates a snpply-pipe 13, and at the opposite side with an exhaust-port 14, With which communicates an eXhaust pipe l5.

The motor described is intended to be operated by means of steam; but it may be 0perated, if desired, by means of any other fluid under suitable pressure. If steam or some other expansible duid be admitted through pipe 13 and port l2 into the chamber formed by the teeth and the portion of the casing ad- IOO jacent to the inlet-port, it will expand and effect the rotation of the drums in opposite directions, since the drum-teeth constitute movable pistons. The steam Will be immediately cut off from the chamber into Which it is first admitted, and the portion admitted will expand through the helical spaces between the rows of teeth until the ends of the drums are reached and then pass out through the exhaust-port. This operation Will be repeated so long as the machine is in operation, since as soon as one central space or opening between the teeth has passed the inlet-port another will come into position to receive the steam, which will expand in the same manner from the middle to the ends of the drums, thus actingiu each case upon aprogressivelyincreasing piston area and causing the rapid and continuous rotation of the drums. This rotation is imparted from the drum 6 to the bowl 2, as Will be readily understood.

It will be seen from the construction and operation described that the bearings of the separator-bowl are practically the only bearings in the machine, since the drum 7 is, so far as the power imparted to thebowl is concerned, an idler which is guided and the movement of which is controlled by the drum 6, the casing, and the pin Il.

It Will be understood that anysuitable oiling devices may be employed and that the construction of the separator-bowl and casing may be anything that is desired or that is found to be practically useful.V

I claim as my inventionl. In a centrifugal separator, the combination with a separator-bowl, a supporting-stud upon which said bowl rotates and a sleeve depending from said bowl, of a huid-motor coniprising two drums having intermeshing gearteeth pistons and a casing provided with an inlet and an exhaust port, said casing and one of said motor-drums being respectively rigidly mounted upon said stud and said sleeve and the other motor-drum being journaled in said casing.

2. kIn a centrifugal separator, the combination with a separator-bowl having a depending sleeve and a supporting-stud upon which said bowl and sleeve rotate, of a fluid-motor comprising a casing rigidly mounted upon ysaid stud, a drum having gear-tooth pistons extending in helical lines from its middle to its ends and rigidly'mounted upon said sleeve and a second drum having gear-tooth pistons Which mesh with those of the first named drum.

In testimony whereof I have hereunto subscribed my name this 23d day of September, A. D. 1896.

C. A. BACKSTROM.

Witnesses:

E. W. N EWELL, M. K. GARRETT. 

